package com.coffee.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.coffee.constant.MessageConstant;
import com.coffee.dto.UserLoginDTO;
import com.coffee.entity.User;
import com.coffee.exception.LoginFailedException;
import com.coffee.mapper.UserMapper;
import com.coffee.properties.WeChatProperties;
import com.coffee.service.UserService;
import com.coffee.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceimpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
//        判断当前用户是否是新用户
        User user = userMapper.getByOpenid(openid);
        //  如果是新用户完成注册
        if (user==null){
            User user1=new User();
            user1.setOpenid(openid);
            user1.setCreateTime(LocalDateTime.now());
            userMapper.insert(user1);
            return user1;
        }
//        返回用户对象
        return user;
    }
}
